Patents by Inventor Andreas Rampold

Andreas Rampold has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Power supply with low loss making current limitation
    Patent number: 6839254
    Abstract: A power supply includes a storage capacitor which can be charged with a rectified input current by means of a current-limiting element which is controlled by a drive circuit. The direct-axis component of current and the direct-axis component of voltage on the current limiting element are supplied to the control circuit as input values and the current limiting element is controlled in such a way that it is not subjected to more than a predetermined maximum power loss.
    Type: Grant
    Filed: June 8, 2001
    Date of Patent: January 4, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventors: Andreas Rampold, Jörg Weiss
  • Circuit arrangement for accurately detecting a direct current derived from clocked electric input values
    Patent number: 6178105
    Abstract: The apparatus is used for detecting an output direct current (Ia) produced by a pulse controller (PS). This pulse controller (PS) has at least one chopper device (Z) for forming a pulsed intermediate voltage (Up) and a pulsed intermediate current (Ip), which are converted by a smoothing device (GA) into an output DC voltage (Ua) and an output direct current (Ia). The apparatus includes a circuit (Ms) for electrically floating detection of the pulsed intermediate current (Ip) and for converting it into a pulsed measurement voltage (Us), and a switching device (Se) which is clocked by the pulsed intermediate voltage. This switching device (Se) supplies the pulsed measurement voltage (Us) in synchronism with the pulsed intermediate voltage to a low-pass filter (Tp), which produces a measurement DC voltage (Um3) that is proportional to the output direct current (Ia).
    Type: Grant
    Filed: June 1, 1999
    Date of Patent: January 23, 2001
    Assignee: Siemens Aktiengesellschaft
    Inventor: Andreas Rampold
  • Electrical power supply with low-loss inrush current limiter and step-up converter circuit
    Patent number: 6094036
    Abstract: An electrical power supply (EPS) including a voltage regulator (SR1) and an inrush current limiter (ICL1) having a current limiting circuit (CL1) and a support capacitor (C1). Charging current spikes produced in particular when the electrical power supply (EPS) is switched on are limited by the current limiting circuit (CL1). The current limiting circuit (CL1) is connected in series with the support capacitor (C1), thus preventing load current from flowing through the current limiting circuit. A step-up converter circuit (SUC) is connected upstream of the current limiting circuit (CL1) with the particular purpose of increasing the voltage (V). An advantage of the arrangement is that, due to the step-up converter circuit (SUC), the support capacitor (C1) has considerably improved support characteristics with regard to the switching regulator (SR1).
    Type: Grant
    Filed: June 5, 1998
    Date of Patent: July 25, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventor: Andreas Rampold